High quality material: The spring automatic door bolt is made of solid aluminum alloy. which is anti rust and anti corrosion. not easy to deform. sturdy and durable. and has high hardness and strength. Unique design: the inner ring is equipped with a spring. and the circular pull ring is used. which is convenient to switch; the base is thickened. and the handle is integrally cast with high stability. Easy to install: align the door bolts with the door and door frame. and screw the attached screws into the wood to fix it. The location can be installed according to your needs. and you can install it in a few minutes. High safety performance: Although the door bolt is small. the material has high hardness and good stability. It is equipped with a spring and will not be easily opened by mistake. It is safe and protects privacy. Wide range of applications: door bolt locks are suitable for fixing small doors. windows. courtyard doors. desk drawers. cabinets. tool boxes. storage cabinets. Kitchen cabinets.etc.